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7.1 Instructions Restricted in Use for Redundant System
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PROGRAMMING CAUTIONS
(2) Rise Instruction
If signal flow memory has not been tracked, after system switching, the rise instruction
is processed as explained below.
(a) Processing
When the systems are switched, the new control system CPU module turns on
data in the signal flow memory.
For this reason, the CPU module does not execute the rise instruction even
though the rise instruction execution condition is satisfied before the systems are
switched.
(b) Relevant Instructions
• LDP,ANDP,ORP
•MEP
•PLS
• P (Examples: MOVP, INCP, etc.)
• SP. ,GP. ,ZP. ,JP. (Intelligent Function Module Dedicated Instructions)
• FF, LEDR, DUTY, TRACE, TRACER
(3) Fall Instruction
If signal flow memory has not been tracked, after system switching, the fall instruction
is processed as explained below.
(a) Processing
When the systems are switched, the new control system CPU module turns on
data in the signal flow memory.
For this reason, the CPU module executes the fall instruction again if the fall
instruction execution condition is turned off before the systems are switched.
(b) Relevant Instructions
• LDF,ANDF,ORF
•MEF
•PLF
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